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Minecraft Beta 1.6 added craftable map items. Unlike books, maps do not store their information in the item - instead, their data value corresponds to the map number (ID) of a saved file. Their information is placed in the "data" directory within the world's save directory. Each map has its own file associated with its ID, and there is one file that keeps track of the highest (= most recently created) map ID. This is limited to the size of a short (65,536).[1] When Notch was adding them the first time he did not use the NBT format.[2]
There is support for The Nether, but it is obscured by the top blocks of the Nether and therefore unreadable. The End is supported without problems.
资料目录结构
idcounts.dat 包含最新的ID在当前的地图。 Each map's file name uses the format map<#>.dat, where <#> is the map's unique number.
map_<#>.dat 格式
map_<#>.dat files are GZip'd NBT files.
NBT 结构
- 根标签
- data: 地图资訊
- scale: 地图缩放 (it is in 2scale 方块每像素, even for 0, where the map will be 1:1). 预设值是3,最小值是0而最大值是4。
- dimension: 0 = 主世界, -1 = 下界, 1 = 末路之地
- height: 地图的高度. 默认 (亦只可能会是) 128。
- width: 地图的寬度. 默认 (亦只可能会是) 128。
- xCenter: 地图的中心 according to real world by X.
- zCenter: 地的中心 according to real world by Z.
- colors: Width * Height array of color values (16384 entries for a default 128x128 map). Color can be accessed via the following method: colorID = Colors[widthOffset + heightOffset * width], where (widthOffset==0, heightOffset==0) is left upper point.
- data: 地图资訊
When this structure is loaded, Colors array is transformed to standard dimension (if it's necessary) and then structure is saved with standard height and width.
idcounts.dat 格式
這個档案会保持追蹤最新製作出來的地图。它以未經壓縮的原始NBT档案儲存。
NBT 结构
- 根标签
- map: 最新的地图ID。
颜色表
地图会使用一个顏色表对应颜色ID來儲存顏色。
Base colors
方块的屬性指明了它們顏色。每种方块材料都拥有一个 base color which is multiplied by 180, 220 or 255, 然後除以255以取得地图的顏色。 Each base color below is associated with four map colors - to get the first map color ID for a base color, multiply the base color ID by 4.
| ID | 颜色 | RGB | 对应方块
|
|---|---|---|---|
| 0 | 透明 | ||
| 1 | 127,178,56 | ||
| 2 | 247,233,163 | ||
| 3 | 167,167,167 | ||
| 4 | 255,0,0 | ||
| 5 | 160,160,255 | ||
| 6 | 167,167,167 | ||
| 7 | 0,124,0 | ||
| 8 | 255,255,255 | ||
| 9 | 164,168,184 | ||
| 10 | 183,106,47 | ||
| 11 | 112,112,112 | ||
| 12 | 64,64,255 | ||
| 13 | 104,83,50 |
地图的颜色
Each base color above has 4 associated map colors below. The conversion works by multiplying each of the red, green, and blue values by a value and then dividing by 255, finally rounding to the nearest whole.
| 地图顏色ID | 乘以R,G,B |
|---|---|
| Base Color ID*4 + 0 | 180 |
| Base Color ID*4 + 1 | 220 |
| Base Color ID*4 + 2 | 255 (same color) |
| Base Color ID*4 + 3 | 220 |
Here is a map color table provided as an example:
| ID | 颜色 | RGB | 对应方块
|
|---|---|---|---|
| 0 | 透明 | ||
| 1 | 透明 | ||
| 2 | 透明 | ||
| 3 | 透明 | ||
| 4 | 89,125,39 | ||
| 5 | 109,153,48 | ||
| 6 | 127,178,56 | ||
| 7 | 109,153,48 | ||
| 8 | 174,164,115 | ||
| 9 | 213,201,140 | ||
| 10 | 247,233,163 | ||
| 11 | 213,201,140 | ||
| 12 | 117,117,117 | ||
| 13 | 144,144,144 | ||
| 14 | 167,167,167 | ||
| 15 | 144,144,144 | ||
| 16 | 180,0,0 | ||
| 17 | 220,0,0 | ||
| 18 | 255,0,0 | ||
| 19 | 220,0,0 | ||
| 20 | 112,112,180 | ||
| 21 | 138,138,220 | ||
| 22 | 160,160,255 | ||
| 23 | 138,138,220 | ||
| 24 | 117,117,117 | ||
| 25 | 144,144,144 | ||
| 26 | 167,167,167 | ||
| 27 | 144,144,144 | ||
| 28 | 0,87,0 | ||
| 29 | 0,106,0 | ||
| 30 | 0,124,0 | ||
| 31 | 0,106,0 | ||
| 32 | 180,180,180 | ||
| 33 | 220,220,220 | ||
| 34 | 255,255,255 | ||
| 35 | 220,220,220 | ||
| 36 | 115,118,129 | ||
| 37 | 141,144,158 | ||
| 38 | 164,168,184 | ||
| 39 | 141,144,158 | ||
| 40 | 129,74,33 | ||
| 41 | 157,91,40 | ||
| 42 | 183,106,47 | ||
| 43 | 157,91,40 | ||
| 44 | 79,79,79 | ||
| 45 | 96,96,96 | ||
| 46 | 112,112,112 | ||
| 47 | 96,96,96 | ||
| 48 | 45,45,180 | ||
| 49 | 55,55,220 | ||
| 50 | 64,64,255 | ||
| 51 | 55,55,220 | ||
| 52 | 73,58,35 | ||
| 53 | 89,71,43 | ||
| 54 | 104,83,50 | ||
| 55 | 89,71,43 |